pathogens Flashcards
1
Q
What Determines the Outcome of Disease
A
- Pathogen: Number of pathogens, Pathogenicity
- Host: Defence capabilities of host, Immunocompromised
2
Q
Pathogen
A
- Infectious agent that is capable causing disease
3
Q
Host
A
- Any organism that carries another organism
4
Q
Infectious Disease
A
- A disease that is caused by a pathogen or infectious agent and can be transmitted from one organism to another
5
Q
Virus
A
- Contains DNA or RNA
- Intracellular obligate pathogen
E.G. Influenza
6
Q
Steps of Virus
A
- Virus targets a specific cell
- Viral genetic material inserted into host cell
- Genetic material replicate in DNA replication
- Cell lysis
- Virus spread to more cells
7
Q
Prion
A
- Misfolded protein
1. Abnormal prion induced misfolding in normal prions
2. Damages the nervous tissue
3. Transmissible spongiform encephalopathy
E.G. Kuru Disease
8
Q
Bacteria
A
- Prokaryotic organism
- Can be intracellular or extracellular
- Treated with antibiotics and disinfectant
1. Rapidly multiply by binary fission
2. Release mycotoxins
3. Toxin cause disease
E.G. Samonella
9
Q
Protozoa
A
- Unicellular eukaryotes
E.G. Malaria
10
Q
Steps of Protozoa
A
- Attaches to intestine
- Prevents nutrient absorption
11
Q
Fungi
A
- Unicellular eukaryotes
E.G. Athletes Foot
12
Q
Steps of Fungi
A
- Survive on surface of skin
- Release mycotoxins
13
Q
Microparasite
A
- Multicellular eukaryotes
- Can be pathogens and vectors
E.G. Tapeworm, Aphids
14
Q
TRANSMISSION (ALL PATHOGENS EXCEPT PRIONS)
A
- Vector transmission
- Contact with infected surfaces
- Contaminated food and water
15
Q
TRANSMISSION: PRIONS
A
- Contaminated surgical tools
- Eating meat containing abnormal protein
- Inheritance
